The Fold and Go Crates have a single door and are black wire. Assembles in minutes with no tools. When you are done using the pet crate just fold it and go! Comes with a plastic pan and is available in the following six sizes: XSmall- perfect size for cats (18” x 12" x 14”) Small (24 x 18 x 19”) Medium (30"x 19" x 21”) Large (36” X 23” X 25”) XLarge (42” X 28” X 30”) Jumbo (48” X30” X 33”).